Mounting for sewing-machine motors



June 16,1925. 1,541,802

. R. EHREVNFELD MOUNTING FOR SEWING MACHINE MOTORS Filed March 14, 1921 INVENTOR WITNESSES:

Patented June 16, 1925.

* UNITED STATES PATENTOFFICE.

RALPH EHRENFELD, or EAST PITTSBURGH, PENNSYLVANIA, 'AssIeNoR T0 wnsriNa HOUSE nnncrnro & MANUFACTURING COMPANY, A ooaronArroN or PEN SYL- VANIA.

MOUNTING FOR $EWING-MACHINE MOTORS.

To all whom it may concern.

Be it known that I, RALPH Er-nznNrntn,

acitizen of the United States, and a resident of East Pittsburgh, in the county of Allegheny and State of Pennsylvanimhave invented a new and useful Improvement in Mountings for Sewing-Machine Motors, of

which the following is a specification.

Myinventionrelates to machines, such as sewingmachines, that are equipped for operation by electric motors, and it has for itsobject to provide a structure wherein the machine and the motor are united in an im proved manner to. form. a strong, rugged, compact and inexpensive combination.

Briefly, my inventionicomprises mounting thevmotor onxa sup-port disposed adjacent to, or.mounted on, thehead of the sewing machine. Heretofore, it has been customary to drive asewing machine by means of a motor so disposedon the machine table as, to engage the hand wheel or by fastening the motor to the sewing machine frame by means of, a complicated and expensive supporting structure. i y More specifically, my invention comprises pivotally mounting the motor upon an auxiliary casingmember mounted E1.Cl]2l9611h110, or on the head of, thesewingmachine; and disposing a resilient means between thehead of the sewing machine and the ,auxrhary casing member that is adapted .to yield ngly hold the driving pinion of the motor 1n engageinent with the hand wheel of the, sewing machine.

For. a better understanding of my invention, reference may now he had to the accompanying drawingsinwhich+ V Fig. 1 is a side elevational view of por:

tion ofasewing machine provided with a motor constructed in accordance with my invention.

Fig. 2 is a cross-sectional view of the structure illustrated in Fig. 1,the sectlon be-.

ingtaken along the lines IL-l-II thereof.

Fig. 3 is an elevational view of a motor employed in connection with my invention, this. view. showing that side of the motor which is disposed within the casing when the motor is in its operative position.

1 Figs lis-anclevational View of a portion of the auxiliary casing, with the motor removed therefrom.

lnthe drawings, a sewing machine5 is of a plurality of bolts 12, or any other suitable attaching means.

"An electric'm0tor'13, provided with a shaft Hand a driving wheel-15, is mounted in the opening 11 in such manner that the driving wheel 15 operatively engages the hand wheel 7 of the sewing machine. The motor 13 is provided with a flangelG having a peripheral machined surface which is adapted to engage that portion of the casing member 10 immediately adjacent to the opening 11 therein. Themotor is also provided with diammetrically oppositely disposed lugs 17, as best shown in Fig.3, whichare adapted to co-operate with coacting substantially semi-circular lugs 18 in the opening 11 of the casing member 10, as best shown in Fig. 4. V r a leaffspring 19 is attached, at its con tral portiointo the motor 13 in such'man. ner that theends thereof project to engage the lugs 18 of the casing member 10 to aid the lugs 17 in holding the motor 13 in its operative )osition with respect to the opening 11. T iis spring serves to prevent vibra tion of the motor withrespectto the machine-head. The motorl3 is provided with a lugQO which isnormally disposed within the space between the upright standard and the casing 10.. and engages a coiled spring 21, also disposed therein, which biasesthe motor to. its operativeposition and thus yieldingly maintains engagement between the, driving wheel 15 and the hand wheel 7.

Inorder to attach'the motor .to the sewing machine head, the motor may be inserted in the opening 11 and revolved against the. force of the spring 21 until the wheel loreaches a positionbelow thehand wheel 7 The casing memberlO. is then attached to the upright standard 9 by means of the bolts 12, after removing the hand wheel; 7. If the casing is already attached to the upright standard, the motor may be attached Ice by first removing the hand wheel 7, turning the motor into such a position that the lugs 17 and the ends of the leaf spring .19 may be passed axially through the openings between the lugs 18 in the casing 1O. The motor is then so turned that the'lugs 17 and the ends of the spring 19 engage the lugs 18, with the spring 21 compressed and the driving wheel 15 disposed below its normal operative position. The hand wheel 7 may then be mounted upon the shaft 6, and the motor 13 be released, whereupon the spring 21 will bias the motor to actuate the wheel 15 into operative engagement with the hand wheel 7.

It'will be noted that the motor and the spring 21 are disposed within the recess caused by indenting the portion 10 of the upright standard 9, thereby reducing the overall width of the machine.

lVhile I have shown but one form of my invention and have described in detail but a single application of the same, it will be obvious to those skilled in the art, that it is not so limited but'is susceptible of various minor modifications and changes without departing from the spiritthereof, and I desire, therefore, that only such limitations shall be placed thereupon as are imposed by the prior art, or are specifically set forth in-the appended claims.

I claim as my invention:

1. In combination, a sewing-machine head comprising an upright standard, an auxiliary casing member mounted adjacent to said upright standard and provided with an opening therein and an electric motor mounted at least partially within said opening.

2. In combination,- a sewing-machine head comprising an upright standard, an auxiliary casing mounted adjacent to, said upright standard and'provided with an opening theroinand an electric motor pivotally mounted at least partially within saidopening.

3. In combination, asewing-machine head comprising an upright standard having a shaft and a hand wheel mounted thereon, an auxiliary casing member mounted adjacent to said upright standard and provided with an element of a bayonet joint, an electric motor adapted to be mounted on said casing member and provided with a co-operating bayonet joint element and means -for operatively connecting said motorto said hand wheel.

4. A sewing-machine having a head comprising an upright standard having a hand wheel mountedthereon, an auxiliary casing member mounted adjacent to said head, a rotatably adjustable'electric motor removably attached to said head and provided witha driving wheel and means for moving said motor upon its'pivotal axis to eiiect engagement of said driving wheel with said drive wheel.

5. A sewing machine having a head comprising an upright standard having a hand wheel mounted thereon, an auxiliary casing member mounted adjacent to said head and provided with an opening therein, an electric motor mounted in proximity to said opening and having projections that eiiect supporting engagement with the wall thereof and provided with a driving wheel and means for yieldingly holding said driving wheel in engagement with said hand wheel.

6. A sewing machine having a head comprising an upright standard having a hand wheel mounted thereon, an auxiliary casing member mounted adjacent to said head and provided with a substantially circular opening having lugs projecting thereinto, an electric motor provided with a driving wheel and'having'lugs adapted to coact with said first mentioned lugsto hold said'motor into posit-ion and means for yieldingly holding said driving wheel in engagement-with said handwheel.

7. A sewing-machinehaving a head comprising an upright standard having a hand wheelmounted thereon, an auxiliary casing member mounted adjacent to said headand provided with a substantially circular opening having'lugs projecting.thereinto, an electric motor provided with a driving wheel and having lugs adapted'to coact with said first mentioned lugs to hold said motor in positionanda spring interposed between said head and said motor to hold said driving wheel iii-engagement with said hand wheel.

8. In combination, a sewing machine head comprising an upright standard having a shaft/and a 'hand wheel mounted thereon, an auxiliary casing member mounted adjacent to said uprightstandard and provided with an element of a bayonet joint, an-electric motor having a driving wheel adapted to en gage saidhand'wheel and provided with a bayonet-joint element adapted to c o-operate with the element on said head and means for yieldingly holding said driving wheel in engagement with said hand wheel, the axis of said co-operatingbayonet-joint elements extending through approxin'iatelythe center of gravity of the motor.

9. A sewing machine having a head comprising an upright standard having ahand wheel mounted thereon, an auxiliary casing member ''mounted adjacent to said head and provided withan opening'having inwardly projecting lugs, an electric'motor mounted adjacent to said opening and resilient means interposed between said motor and said lugs to hold said motor in position.

10. A sewing machine having a head comprising an upright standard having a hand wheel mounted thereon, an auxiliary casing member-mountedadjacent to said head and provided with an opening having inwardly PIOJGClLlHg' lugs, an electric motor mounted adjacent to said opening and a leaf spring having its intermediate portions attached to said motor and having its ends adapted to coact with said lugs to hold said motor in position. v i

11. A sewing machine having a head comprising an upright standard having a hand wheel mounted thereon, an auxiliary casing member mounted adjacent to said head and drive wheel and said hand wheel in engagement.

12. In combination, a sewing machine head having a hand wheel mounted thereon and comprising an upright standard, an auxiliary casing member mounted adjacent and attached to said upright standard, said casing member being provided with an opening therein, an electric motor provided with a driving Wheel pivotally mounted within said opening and a spring disposed between said upright standard and said casing member and adapted to cause said driving wheel to yieldingly engage said hand wheel. 7

In testimony whereof I have hereunto subscribed my name this 7th day of March, 1921. RALPH EHRENFELD. 

